I think it’s definitely unusual, but more usuable than [name_m]Albus[/name_m] (unless you’re a CRAZY HP fan and don’t mind that every person ever will comment on that…). [name_m]Albie[/name_m] is so cute, I don’t blame you for looking for alternatives.
It reminds me of some similar names that are a bit rare, but have an old-fashioned ring to them: [name_u]Alden[/name_u], [name_m]Elden[/name_m], [name_m]Abram[/name_m], [name_m]Edgar[/name_m], [name_m]Alger[/name_m].
I adore [name_m]Alban[/name_m] [name_m]Theodore[/name_m] [name_u]Jude[/name_u]!!! In fact, [name_m]Theodore[/name_m] [name_u]Jude[/name_u] is one of my favorite boy names. [name_m]Alban[/name_m] is a good name, I really like it. [name_m]Albie[/name_m] is sooooooooooo nice.